Update: Puzzle had 2 solutions. Fixed now. Apologies.
Just about got in a Wednesday post.
Rules – Follow regular Sudoku rules. Additionally, the number in a circle is the sum of the digits which are covered by its arrow. For circles with multiple arrows, apply the rule for each arrow separately, where some arrows can have some cells in common. (e.g., 1-2-3 and 1-2-1-2 are valid sums for a 6 in a circle, with the starting 1-2 being common).